Combining per tone equalization and windowing in DMT receivers

Abstract

Access to Networks ALCATEL B-3001 Leuven-Heverlee -Belgium {cuypers, ysebaert, moonen}@esat.kuleuven.ac.be 2018 Antwerpen, Belgiuin piet. vandaele@a1catel.be ABSTRACT A novel equalization technique for Discrete multitone (DMT) based modems is proposed which incorporates receiver win dowing operations. The method is especially useful in an environment dominated by crosstalk and narrowband inter ference, such as digital subscriber line (OSL). The high side lobe level of the OFT filters present in classical OMT re ceivers leads to considerable performance degradation due to intercarrier interference and broadband susceptibility to narrowband disturbers. Window functions can be used to alleviate this, but they are difficult to combine with equal ization techniques, e.g. per tone equalization [1]. The pre sented method offers a way to do so without unduly increas ing the complexity.